CN218567741U - Compact and large-field-angle head-up display system - Google Patents

Abstract

A compact and large field angle heads-up display system comprising 1) a micro display chip; 2) A transparent optical element at a distance from the display chip. The optical element further comprises a phase modulation layer, a transflective layer, and a phase compensation layer. The phase modulation layer controls the light of the micro display chip in a specific way, so that the light rays form a virtual image at a far distance. The phase modulating surface may be a multilayer holographic structure, or a fresnel lens. The surface shape of the fresnel lens may be derived from a spherical surface, an aspherical surface, or a free-form surface, or a hologram. The phase compensation layer makes the transparent element transparent to light passing through the transparent element by compensating for phase variations of the phase modulation layer. The transparent optical element described above may be integrated on an automotive front windshield. The micro display chip is placed under the dashboard of the vehicle. The system utilizes the automobile space between the windshield and the instrument panel, and greatly reduces the volume of head-up display.

Description

Compact and large-field-angle head-up display system

Technical Field

The utility model belongs to the technical field of the optical display, especially, relate to a compact and big angle of vision new line display system.

Background

Head-up displays (Head upsPLAYLHUDs) have been widely used in automobiles, ships, airplanes, and the like. The method is characterized in that displayed contents are superposed on the outside world, so that a driver can see the conditions of the outside road and displayed information simultaneously when driving. The driver does not need to lower the head when watching the displayed information, thereby greatly improving the driving safety performance and the driving comfort. At present, the main realization mode of the automobile head-up display is realized by utilizing a high-brightness micro-display and a plurality of traditional lenses or reflectors. In existing head-up display systems, all of these optics are placed under the dashboard of the vehicle. To achieve a large field of view (FOV), the last lens requires a rather large aperture, resulting in a bulky head-up display system. The large size limits the application of head-up display, and the head-up display is only used on a few high-end and large-sized vehicles.

There is an urgent need for a heads-up display system with simple structure, small volume and low cost.

Disclosure of Invention

In view of the foregoing deficiencies in the prior art, it is an object of the present invention to provide a new compact and wide field angle heads-up display system that is small in size.

The utility model discloses a head-up display system, which comprises 1) a micro display chip; 2) A transparent optical element at a distance from the display chip. The optical element further comprises a transflective layer, a phase modulation layer, and a phase compensation layer. The phase modulation layer controls the light of the micro display chip and reflects the light to human eyes to enable the light to become a virtual image at a far distance; the transflective layer also allows a portion of the real world light to pass through. The displayed content can be overlaid on the external real world, and normal driving of the driver is not influenced.

One implementation scheme is as follows: the phase modulation layer is provided with the semi-reflecting and semi-transmitting layer, and light emitted from the micro display chip directly enters the semi-reflecting and semi-transmitting layer or enters the semi-reflecting and semi-transmitting layer after passing through the light of the auxiliary optical imaging system; after the reflection of the semi-reflecting and semi-transmitting layer, set phase modulation is generated, and on one hand, the phase modulation is reflected into human eyes, and on the other hand, a virtual image in the position opposite to the human eyes relative to the optical element is generated through the phase modulation; the phase compensation layer compensates the phase change of the phase modulation layer, so that the effect of no phase modulation on the light passing through the optical element is achieved, and the light enters the human eye without interference.

The compact and wide field angle heads-up display system may further include: 3) An auxiliary optical imaging system positioned intermediate the microdisplay chip and the transparent element.

The Micro display chip can be LCOS, LCD, DLP, OLED, micro-LED and other common Micro display technologies. The micro display chip generates a high-brightness, small display image. In LCOS, LCD, DLP and other display technologies, the micro display chip also includes a light source illumination module associated therewith. In self-luminous display chips such as LEDs, micro-LEDs, OLEDs and the like, a light source display module can be omitted, and the smaller size is achieved.

The optical element further comprises a phase modulation layer, a semi-reflecting and semi-transmitting layer and a phase compensation layer. The phase modulation layer is combined with the semi-reflecting and semi-transmitting layer, light which is emitted by the micro-display chip and passes through the auxiliary optical imaging system is specifically controlled and reflected to human eyes, and the light becomes a virtual image at a distance. The semi-reflecting and semi-transmitting layer enables a part of real world light to transmit. Therefore, a virtual display is superposed with the real world, and the normal driving of the driver is not influenced.

In a first embodiment of the invention, the phase modulation surface is a holographic structure. The holographic structure can be produced by a computer-generated holographic method or by a method of coherent recording using two laser beams. The design requirement of the holographic structure is that the micro display chip forms a virtual image through the holographic structure.

In another embodiment of the present invention, the phase modulation surface may be a fresnel lens, which is a surface shape of a lens and is formed by removing a parallel flat portion of the lens that does not contribute to light, so that a lens with a certain thickness becomes a thin plate, while maintaining the original function of the lens. The surface shape of the fresnel lens may be derived from a spherical surface, an aspherical surface, or a free-form surface, or a hologram. In the design process, various optical simulation software is used for designing a spherical surface, an aspherical surface and a free-form surface, and then the curved surfaces with certain vector height are made into the shape of a Fresnel lens by using a mode known by an industrial optical engineer. The phase modulation surface is further plated with a semi-reflecting and semi-transmitting layer, light which is emitted from the micro display chip and passes through the auxiliary optical imaging system is reflected by the semi-reflecting and semi-transmitting mirror to generate specific phase modulation, and the specific phase modulation can be reflected to human eyes on one hand, and on the other hand, the phase modulation generates an effect of generating a virtual image outside the optical element.

The phase compensation layer compensates the phase change of the phase modulation layer, so that the light rays passing through the optical element have no phase modulation at all and enter eyes without interference, and the optical function of the optical element is a transparent and imaging device. The micro-display has no effect on the light of the outside world, is basically transparent, and can form a virtual image for the light of the micro-display.

The head-up display system disclosed in this patent further comprises other optical imaging systems, such as a spherical mirror, a reflecting mirror, an aspheric surface, and a free-form surface, which are used in cooperation with the transparent optical element. The light emitted from the microdisplay and amplified by the auxiliary optical imaging system is displayed as a virtual image outside the optical element. The optical elements also play a role of folding the light path at the same time, so that the volume of the optical system of other parts except the last optical element is as small as possible, and the optical system can be placed under the automobile instrument panel, thereby being suitable for more automobile types. The secondary optical imaging system may be configured such that the light from the microdisplay is directed into a virtual image by the transparent optical element, or the secondary optical imaging system may not be needed.

The transparent optical element is in a planar structure or a nearly planar structure. Further, the transparent optical element is shaped in a planar configuration or sufficiently close to a planar configuration. For example, the curvature of the transparent optical element is sufficiently small that it can be mounted on the windshield of an automobile. In another embodiment of this patent, the curvature of the automotive glass is designed into the overall curvature of the system.

Since the element is transparent to the light of the outside world, it can be integrated directly on the windscreen without affecting the normal use of the driver. The head-up display system features a last transparent optical device integrated on the windshield. The existing space on the windshield and the instrument desk can be utilized, only a part of the optical machine is integrated under the instrument desk, and only the volume of the optical machine integrated under the instrument desk can influence the installation of the head-up display. The space required by the optical machine of the head-up display is greatly reduced. So that the heads-up display can be applied to various sizes of vehicles.

The phase modulation surface is also plated with a semi-reflecting and semi-permeable layer. The transflective layer means that part of light irradiated on the surface of the transflective layer is reflected and part of the light is transmitted. The reflectance R and transmittance T may be in any interval from 0% to 100%. The transflective layer can be realized by a metal reflecting film, and can also be realized by forming a refractive index gradient by using a medium with high refractive index.

In an embodiment of the present invention, the semi-reflective and semi-transparent layer has polarization selectivity, and only reflects light of a certain polarization state, and transmits light of another polarization state. In this embodiment, the light emitted from the micro display chip is also set to this polarization state, so that the light emitted from the micro display chip can be reflected to the human eye with a high reflectivity, improving the luminous efficiency of the display. While also maintaining a high transmittance.

The utility model discloses a in another embodiment, the light that above-mentioned little display chip sent is red green blue's narrowband light, the reflection wavelength interval of the medium reflection stratum of semi-reflection layer with little display chip emission light wavelength interval is close for from the light that above-mentioned little display chip sent, in the eyeball is reflected to most, improved the luminous efficacy who shows, also keep higher transmissivity simultaneously.

In another embodiment of this patent, the transflective layer further comprises an electro-optic or opto-optic device, the reflectivity and transmittance of which can be adjusted to accommodate different ambient light. The photoelectric device can be various liquid crystal, electrochromic, electrophoresis and other devices. The photo-optic device may be a variety of photochromic devices.

The phase compensation layer is closely matched with the phase modulation layer, and the phases of the phase compensation layer and the phase modulation layer are opposite and are mutually compensated. The transmitted light and the transmitted light are mutually counteracted and do not produce any effect, so that the external image is not influenced and reaches the eyes of people to form transparent display. The phase compensation layer can be formed by various well-known optical processes, and the phase modulation layer can be formed separately and then bonded together by optical glue. It is also possible to fill the phase modulation layer directly thereon with a flexible optical material after it has been shaped and then cured to form it automatically.

The utility model discloses a vehicle new line display system, wherein become the transparent optical element of virtual image and installed on windshield, realized big angle of vision, little volume new line demonstration. The advantages are that:

● The viewing angle is large, the display area is large, and more contents can be displayed.

● The transparent optical element can be placed on the front windshield of an automobile because the curvature of the transparent optical element is small enough and has no effect on the transmitted light. The original space is fully utilized.

● The volume under the instrument panel is small, and the instrument panel can be adapted to more vehicle types.

Drawings

Fig. 1 (a) is a schematic diagram of an embodiment of the present invention, and fig. 1 (b) is a schematic diagram of an embodiment of the present invention including a virtual image.

Fig. 2 is a schematic structural view of a transparent optical element in which a phase structure is a holographic structure, wherein fig. 2 (a) is a view showing that a CGH structure can be designed by a calculation method based on a point light source concept in which an object is exploded at a self-luminous point; FIG. 2 (b) is a diagram of computing the base holograms for each point source and synthesizing a final hologram map by superimposing all the base holograms;

fig. 3 is a schematic diagram of a structure of the transparent optical element, wherein the phase structure is a fresnel surface type.

FIG. 4 is a schematic diagram of a transparent optical element in which the phase structure is a binary optical surface.

Fig. 5 is a schematic diagram of a configuration of a transparent optical element in which the phase structure is a holographic surface type.

Fig. 6 is an example of a computer generated holographic phase modulation layer.

Detailed description of the preferred embodiments

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

Examples

A first embodiment of the present invention is shown in fig. 1 (a) and 1 (b). This embodiment is only an example of an automobile, and illustrates the application of the present invention. The engineer in the industry can apply the concept of this embodiment to various other vehicles and vehicles (such as aviation, etc.), and become a virtual image fused with the real world, without departing from the scope of the present invention.

The micro display chip (micro display screen) 101 produces a small image with high brightness. The image is formed as an enlarged virtual image 112 to a driver (mainly, eyes of the driver) 111 via the auxiliary imaging optical element 103 and the transparent optical element 105. The virtual image 112 of the human figure shown in fig. 1 is only an example, and the core is to enlarge the image generated by the micro display chip into a virtual image, and does not mean that the virtual image is human.

The transparent optical element 105 is contoured to a planar or near-planar configuration. Further, the transparent optical element is shaped in a planar configuration or sufficiently close to a planar configuration. The curvature of the transparent optical element 105 may be small enough while being transparent to the outside image, and may be integrated on the windshield 107 to display information about driving or entertainment on the road surface. The transparent optical element 105 is formed in a plane-like structure having a small thickness and a sufficiently small curvature, and the transparent optical element 105 may be disposed in front of the windshield 107 by a separate structure such as a bracket or the like, or may be attached to the windshield 107. When the transparent optical element 105 is purchased in advance by an automobile or the like, the curvature of the windshield 107 can be adapted to the curvature of the transparent optical element 105 and directly integrated on the existing windshield 107. The transparent optical element 105 is positioned so that the driver can view the displayed information without lowering his head while driving. The design can greatly enhance the driving safety and comfort. Unlike conventional automotive heads-up displays, one side of the transparent optical element 105 of this patent is mounted on the windshield 107 of the automobile, taking advantage of the large amount of space between the dashboard 109 and the windshield 107. The space that actually needs to be installed in the vehicle body below the instrument panel 109 is reduced, so that the heads-up display can be applied to various vehicle models.

The Micro display chip (Micro display screen) 101 may be one of the common LCD, LED, LCOS, DLP, OLED, micro-LED, electronic paper elk, and other Micro display technologies, and may further include a related light source, a light homogenizer (diffuser), an electronic controller, a communication module, and a heat dissipation module, in order to generate a high-brightness image. Different types of microdisplay chips do not depart from the scope of this patent.

In order to further improve the imaging quality, one or more auxiliary imaging optical lenses (or auxiliary optical imaging systems) 103 may be further disposed on the micro display chip. It can include the reflector in order to adjust the direction of light path, and folding light path reaches the volume of minimum to and lens, prism, aspheric surface reflector, the well-known optical components and parts of industry engineer such as free-form surface mirror, these different components and parts combinations do not break away from the utility model discloses a protection category.

An enlarged view of the transparent optical element 105 is shown in fig. 3, and includes a phase modulating surface 302, a transflective layer 303, and a phase compensating layer 304. The phase modulation layer is combined with a semi-reflective and semi-transparent layer, and specifically controls the light emitted by the micro display chip 101 and amplified by the auxiliary imaging optical system 103, so that the light is reflected to human eyes, and the light passing through the optical system is a virtual image at a far position. The transflective layer 303 allows a portion of the real world light to pass through.

The phase compensation layer 304 compensates for the phase change of the phase modulation layer 302, so that the phase disturbance generated by the transparent optical element 105 for the light passing through the optical element is sufficiently small. Without phase modulation, the optical fiber enters the eye without interference and plays the role of a transparent optical flat plate. The optical component has the optical function of being a device which is transparent and can image. The light emitted by the optical system below the instrument panel 109 can be a virtual image.

Specifically, the transflective layer 303 may be disposed on the phase modulation layer 302, and light emitted from the micro display chip 101 directly enters the transflective layer 303, or passes through the auxiliary optical imaging system 103 and then enters the transflective layer 303; after being reflected by the semi-reflecting and semi-transmitting layer, the optical element generates set phase modulation, and on one hand, the optical element is reflected into human eyes to generate a virtual image relative to the position of the optical element opposite to the human eyes; the phase compensation layer compensates the phase change of the phase modulation layer, so that the effect of no phase modulation is achieved for the light passing through the optical element, and the light can enter the human eye without interference.

In other words, the optical path is configured to emit light from the micro-display chip 101 through the auxiliary optical imaging system 103 and enter the transflective layer 303, the reflective layer generates a predetermined phase modulation after being reflected into the human eye, and the reflective layer generates a predetermined phase modulation after being reflected by the transflective layer, and the phase modulation generates a virtual image in a position opposite to the human eye with respect to the optical element. The phase compensation layer can be used for compensating the phase change of the phase modulation layer, so that the light rays passing through the optical element can enter human eyes without interference. The optical component which is transparent and can image realizes the visual effect of a large field angle, and the design of the light path and the fineness of the optical instrument are small, so that each component can be arranged in various available spaces utilizing the windshield and the instrument desk, and the effect of multiple adaptive vehicle types is achieved. The transparent optical element 105, which has a sufficiently small curvature and is transparent to external images, can be integrated into the windshield 107 to display information about driving or entertainment on the road surface. The driver can see the displayed information without lowering head when driving, and the driving safety and comfort are greatly enhanced. Unlike conventional automotive heads-up displays, one side of the transparent optical element 105 of this patent is mounted on the windshield 107 of the automobile, taking advantage of the large amount of space on the dashboard 109 and windshield 107. The space in the vehicle body which is actually required to be installed below the instrument panel 109 is greatly reduced, so that the head-up display can be suitable for various vehicle types.

The principle of the transparent optical element is described in detail below, and the element is illustrated by way of example. The first core of the transparent optical element is: the phase compensation layer compensates the phase change of the phase modulation layer, so that the effect of no phase modulation on the light passing through the optical element is achieved, and the light enters the human eye without interference. This can be achieved in particular as follows. A phase modulation layer that may have nano-or micro-scale phase modulation structures, 2) a phase compensation layer having nano-or micro-scale phase compensation structures that compensate for phase variations produced by the phase modulation layer, 3) a partially transparent and reflective layer between the phase modulation layer and the phase compensation layer that partially reflects light and allows light to partially pass through. The above structure may be repeated a plurality of times to form a multi-layered structure (from 1,2 to i-1, i). Different light rays (from a, b \8230z, note that the english letters are used only to denote different light rays, and are not limited to 26) pass through the optical film at different positions and at different angles.

In optics, the Optical Path Length (OPL) or optical distance is the product of the geometric length of the different path rays (L1, L2, to Li) through the system and the refractive index (N) of the medium through it, (OPL = L X N). The difference in optical path length between the two paths is commonly referred to as the Optical Path Difference (OPD). The optical path is important because it determines the phase of the light and controls interference and diffraction as the light propagates. The optical path length between the phase modulation layer and the phase compensation layer is OPD1. The phase modulation layer and the phase compensation layer have opposite optical phases, and thus they compensate each other. The total optical path length of all rays (a, b \8230z; z) passing through the entire film is a constant C.

Where C is a constant, OPDi is the phase modulation of each optical structure, i represents a different optical layer, i =1 to n.

Because the multilayer phase structure has a plurality of design freedom degrees, the phase structure can realize complex optical functions and meet various imaging requirements.

The optical fabrication process of the phase modulating structure is produced using methods including, but not limited to, photolithography, nano-pressing, nano-imprinting, and the like. The light rays passing through the transparent optical element generate set phase modulation after being reflected by the semi-reflecting and semi-transparent layer, and the phase modulation also generates a virtual image which is opposite to the human eyes relative to the optical element.

The phase modulation structure in the transparent optical element 105 is further described with reference to fig. 2, 3, 4, and 5. In one embodiment (as shown in fig. 2), the phase structure may be implemented in different ways, including but not limited to scattering surface relief structures, various grating structures, and Computer Generated Holograms (CGH), etc. In one embodiment, the surface relief structure may be replicated from a holographically recorded master. The phase modulation layer is a computer hologram CGH structure as shown in fig. 2 (a) and (b). As an example, the CGH structure may be designed by a calculation method based on a point light source concept, in which an object is decomposed in a self-luminous point diagram 2 (a). The base hologram for each point source is computed and the final hologram is synthesized by superimposing all the base holograms. Light from the microdisplay chip is reflected in a direction to create a virtual image.

The features of these embodiments, as well as other embodiments, will be better understood by those of ordinary skill in the art upon reading the remainder of the specification. There are different phase modulation layers that can redirect light into different directions with different distribution angles, and these variations do not depart from the scope of the disclosed techniques and methods.

In an embodiment of the transparent optical element of the present invention, the transparent optical element 301 in the embodiment of fig. 3 is a fresnel surface type. Comprises a phase modulation layer 302, the surface of the phase modulation layer is coated with a semi-transmission/semi-reflection layer 303, and a phase compensation layer 304 matched with the phase modulation layer.

The phase modulation layer 302 may be a modified fresnel lens, such as a fresnel lens with a thin structure and a lens surface, and the surface shape of the fresnel lens 302 may be derived from a spherical surface, an aspherical surface, or a free-form surface, or a hologram. The surface design is generated by optical design software, and is matched with other optical parts in the system to generate an enlarged virtual image for the image generated by the micro display chip.

The phase compensation layer 304 and the phase modulation layer 302 are tightly matched together, and for the transmitted light, the phases of the two layers are mutually offset, so that no effect is generated, and the external image can reach the human eye without being affected, thereby forming a transparent display.

Fig. 4 is another implementation of the transparent optical element 401. In which a binary optical structure is used. The phase modulation layer 402 with binary optical structure is designed by computer, the surface is provided with a unique surface shape structure, the surface is plated with a semi-reflecting and semi-transparent metal film layer, a polarization film or an optical medium film 403, and a phase compensation layer 404. The phase modulation layer 402 is designed to make an enlarged virtual image of the light emitted from the micro display chip 101 and amplified by the auxiliary optical imaging system 103. The modulation surface can be processed by nanoimprint method, and can be made on optical substrate by computer control to form specific surface shape on the mold.

Fig. 5 is another implementation of the transparent optical element 501. Wherein a holographic optical structure is used. The phase-shift modulator comprises a holographic phase modulation layer 502 designed by a computer, a unique surface-shaped structure matched on the surface, a semi-reflecting and semi-transparent metal film layer or an optical medium film 503 plated on the surface, and a phase compensation layer 504. The phase modulation layer 502 is designed to make an enlarged virtual image of the light emitted from the micro display chip 101 and amplified by the auxiliary optical imaging system 103. The modulation surface can be processed by nanoimprint method, and can be formed into specific surface shape on the mould by computer control, and can be made on the optical substrate by nanoimprint method. The recording on the optical substrate may be performed by coherent light.

Fig. 6 is an example of a computer generated holographic phase modulation layer.

In the embodiment of the present invention, the phase modulation surface is further plated with a semi-reflective and semi-transparent layer. The transflective layer means that part of light irradiated on the surface of the transflective layer is reflected and part of light is transmitted. The reflectance R and transmittance T may be in any interval from 0% to 100%. The transflective layer can be realized by a metal reflecting film or by forming a refractive index gradient by using a medium with high refractive index.

In an embodiment of the present invention, the semi-reflective and semi-transparent layer has polarization selectivity, and only reflects light of a certain polarization state and transmits light of another polarization state. In this embodiment, the light emitted from the micro display chip is also set to this polarization state, so that the light emitted from the micro display chip can be reflected to the human eye with a high reflectivity, improving the luminous efficiency of the display while maintaining a high transmittance.

In another embodiment of the present invention, the light emitted by the micro display chip is red, green and blue narrow-band light, the reflection wavelength of the medium reflection layer of the semi-reflection layer is close to the emission wavelength of the micro display chip, so that the light emitted by the micro display chip is mostly reflected to the eyeball, thereby improving the luminous efficiency of the display and simultaneously maintaining a high transmittance.

In another embodiment of this patent, the transflective layer further comprises an opto-electronic or opto-optical device, the reflectivity and transmittance of which can be adjusted to accommodate light in different environments. The photoelectric device can be various liquid crystal, electrochromic, electrophoresis and other devices. The photo-optic device may be a variety of photochromic devices.

The phase compensation layer is closely matched with the phase modulation layer, and the phases of the phase compensation layer and the phase modulation layer are opposite and are mutually compensated. For the light of the transmission light path, the light and the light cancel each other out without any effect, so that the external image is not influenced and reaches the human eyes to form transparent display. The phase compensation layer can be formed by various well-known optical processes, and the phase modulation layer can be formed separately and then bonded together by optical glue. It is also possible to fill the phase modulation layer directly thereon with a flexible optical material after it has been shaped and then cured to form it automatically.

Second example

In this embodiment of the present invention, the secondary optical element 103 is an alternative device, which can further reduce the volume of the system. For example, the light path is formed directly from the microdisplay chip and the transparent optical element. The phase modulation layer is provided with the semi-reflecting and semi-transmitting layer, and light emitted from the micro-display chip directly enters the semi-reflecting and semi-transmitting layer; after reflection of the semi-reflecting and semi-transmitting layer, set phase modulation is generated, on one hand, the phase modulation is reflected into human eyes, and on the other hand, the phase modulation generates a virtual image which is opposite to the human eyes relative to the optical element; the phase compensation layer compensates the phase change of the phase modulation layer, so that the effect of no phase modulation on the light passing through the optical element is achieved, and the light enters the human eye without interference.

To sum up, the utility model provides a compact large-viewing angle new line shows HUD system, include: the micro display device comprises a micro display chip (micro display screen), an auxiliary optical imaging system and a transparent optical element, wherein the micro display chip is used for generating display images, the auxiliary optical imaging system is used for amplifying the images from the micro display chip, and the transparent optical element is used for further amplifying the light amplified by other optical systems into virtual images. The reflective optical element comprises a phase modulation layer and a phase compensation layer, and the phase modulation layer and the phase compensation layer are mutually counteracted for transmitted light and do not have any effect, so that external images can reach human eyes without being influenced, and transparent display is formed. Unlike conventional automotive heads-up displays, the transparent optical element is mounted on the windshield of an automobile, taking advantage of the large space between the dashboard and the windshield. The space in the vehicle body which is actually required to be arranged below the instrument panel is greatly reduced, so that the head-up display can be suitable for various vehicle types.

It should be understood that the application of the system of the present invention is not limited to the above examples, and that modifications and variations can be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to fall within the scope of the appended claims.

Claims (15)

1. A compact, large field angle heads-up display system includes 1) a micro-display chip; 2) A transparent virtual image-forming optical element at a certain distance from the micro display chip, the optical element further comprising a semi-reflective and semi-transparent layer, a phase modulation layer, and a phase compensation layer; the phase modulation layer controls the light of the micro display chip and reflects the light to human eyes, so that the light becomes an amplified virtual image at a distance; the transflective layer also allows a portion of the real world light to pass through, and the optical element is shaped in a planar or sufficiently close to planar configuration.

2. A compact, high field angle heads-up display system as claimed in claim 1, further comprising an auxiliary optical imaging system for processing the light emitted from the microdisplay chip through the auxiliary optical imaging system and then into the optical device.

3. A compact and wide field angle head-up display system as claimed in claim 2, wherein said phase modulation layer controls the light of said micro display chip to be reflected to human eye, so that the light becomes an enlarged virtual image at a distance; the transflective layer allows a part of light of the real world to pass through further comprises:

the phase modulation layer is provided with a semi-reflecting and semi-transmitting layer, and light emitted from the micro display chip directly enters the semi-reflecting and semi-transmitting layer or enters the semi-reflecting and semi-transmitting layer after passing through the light of the auxiliary optical imaging system; after reflection of the semi-reflecting and semi-transmitting layer, set phase modulation is generated, and on one hand, a virtual image which is opposite to the human eye position relative to the optical element is generated after reflection of the semi-reflecting and semi-transmitting layer into the human eye; the phase compensation layer compensates the phase change of the phase modulation layer, so that the effect of no phase modulation on the light passing through the optical element is achieved, and the light enters the human eye without interference.

4. A compact, large field angle heads-up display system as claimed in claim 1, wherein the micro-display chip is one of the following micro-display technologies: LCOS, LCD, DLP, OLED, LED, micro-LED.

5. A compact, high field angle heads-up display system as recited in claim 1, wherein said optical element is configured to be integrated into a vehicle front windshield.

6. A compact, high field angle heads-up display system as recited in claim 1, further comprising other optical imaging systems, said other optical systems comprising spherical, mirrored, aspherical, or free-form surfaces, and being used in conjunction with transparent optical elements.

7. A compact, large field angle heads-up display system as recited in claim 1, wherein said phase modulation layer is a holographic structure which forms an enlarged virtual image of the image produced by said microdisplay chip.

8. A compact large field angle heads-up display system as claimed in claim 1, wherein the phase modulation layer is a thin fresnel lens with a lens surface, and the phase modulation produced by the fresnel lens is a spherical mirror to make the image produced by the micro-display chip into an enlarged virtual image.

9. A compact large field angle heads-up display system as claimed in claim 1, wherein said phase modulation layer is a thin fresnel lens with a lens surface shape, and the phase modulation produced by the fresnel lens is an aspherical mirror to form an enlarged virtual image of the image produced by said micro display chip.

10. A compact, large field angle heads-up display system as claimed in claim 1 wherein said phase modulation layer is a thin fresnel lens with a lens profile, the fresnel lens producing a phase modulation that is a free-form surface mirror that magnifies the image produced by said micro-display chip into a virtual image.

11. A compact, high field angle heads-up display system as recited in claim 1, wherein said transflective layer is a metal semi-reflective layer.

12. A compact, high field angle heads-up display system as recited in claim 1, wherein said transflective layer is a dielectric reflective layer.

13. The compact large-field-angle head-up display system as claimed in claim 1, wherein the reflective wavelength range of the dielectric reflective layer of the transflective layer and the emission wavelength range of the micro-display chip are close to each other, so that most of the light emitted from the micro-display chip is reflected into the eyeball.

14. A compact, high field angle heads-up display system as recited in claim 1, wherein the emitted light from said microdisplay chip has a specific polarization state, and the reflected light from said transflective layer is configured to control said polarization state such that a substantial portion of the light emitted from said microdisplay chip is reflected into the eye.

15. A compact, high field angle heads-up display system as recited in claim 1, wherein the reflectivity and transmittance of the transflective layer is configured to be adjustable to accommodate different ambient light.

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